Aren't there security issues with Open Source?

  This is an interesting one. The answer is no – and in fact, there's a pretty good argument that Open Source systems are more secure than traditional software.   “Huh?” you say. It does sound a bit odd – that a product with freely-viewable source code could be more secure than something that's locked up and “hidden.” But in fact, with the enforced vigor and peer review inherent to open source, potential vulnerabilities are identified and fixed much more quickly and easily. In one well-publicized event, an application was open-sourced by a vendor who had been “supporting” this application to customers including large banks and the U.S. military for years. Within 24 hours of the source code being publicly available, a major back door security hole – which had been there for years – was identified and fixed by an open source developer looking at the code for the first time!    
mead